Voltage-controlled magnetic impedance transformer

Abstract

The invention discloses a voltage-controlled magnetic impedance transformer which comprises at least one magnetic dielectric layer. The magnetic dielectric layers are designed to be stacked. The magnetic dielectric layers close to the end parts are respectively connected with microwave transmission lines, and the microwave transmission lines of the two magnetic dielectric layers are coupled with each other; each magnetic dielectric layer is connected with a voltage-controlled electrode so as to change the magnetic field intensity or direction of the magnetic dielectric layer under the applied voltage; the magnetic field direction of the magnetic dielectric layer is perpendicular to the electromagnetic field direction of a microwave signal transmitted in the microwave transmission line, or the difference between the magnetic field direction of the magnetic dielectric layer and the electromagnetic field direction of the microwave signal is an angle ranging from 0 degree to 90 degrees. The voltage-controlled magnetic impedance transformer has filtering and isolating functions, and impedance conversion and frequency tuning are realized. Miniaturization design can be realized, integration is facilitated, multi-channel work can be realized, and broadband work can be realized by using a magnetic medium. The linearity can be improved, and wide-temperature and high-reliability work can be realized.

Description

technical field [0001] The invention relates to the field of microwave communication, in particular to a voltage-controlled magnetic impedance converter. Background technique [0002] There are two schemes for the impedance adjuster realized in the existing technology: one is an electronically controlled impedance adjuster based on a mechanical structure, and the other is an impedance adjuster based on adjustable discrete components such as inductors, capacitors, and resistors. The corresponding principles and structural features as follows: [0003] (1) The characteristics of the electronically controlled impedance adjuster based on the mechanical structure realized by the existing technology: [0004] (a) There is a central conductor or cavity through the signal; [0005] (b) Probes driven by mechanical motors are used to achieve impedance tuning; [0006] (c) When the motor drives the probe to move along the central conductor or cavity, the phase presented by the port ...

AI Technical Summary

Problems solved by technology

Due to the large volume of the impedance adjuster in the prior art, it is difficult to integrate the probe and the impedance adjuster in the current on-chip system integration solution, and it needs to be connected through a coaxial or waveguide interface

The problem is that on the premise that the chip system integration needs to meet the weight of the adjuster, high-precision positioning is performed, and the reserved space on the probe station must also meet the volume requirements of the adjuster, and the system integration is very difficult.

[0025] (b) Phase shift is difficult to achieve, especially for applications that require real delay

Adjustable discrete components such as inductors, capacitors, and resistors can produce phase shifts within a certain range, but they are not real phase shift devices after all, and it is difficult to meet the needs of some real delay measurement applications.

[0026] (c) Impedance adjustment accuracy is not high

Discrete components such as adjustable inductors, capacitors, and resistors usually work in the nonlinear region. The electrical properties of the components change nonlinearly with the control voltage, and the changes are sensitive and temperature-dependent, making it difficult to achieve high-precision and stable deployment.

[0027] Limited to low-frequency applications, it is difficult to meet the needs of high-frequency applications above 2GHz

Existing discrete component technology, due to the frequency band limitation of adjustable inductors, capacitors, resistors and other discrete components, electronically controlled adjustable impedance matching usually works within 2GHz, which is difficult to meet the needs of high-frequency applications above 2GHz

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